as far as the others, obama is not that easy to ridicule. "saturday night live" had two impersonators, still doesn't have it. and the 1950s lingo, gosh, gee whiz, isn't hard to make people laugh. fourth most joked about in the study, man of outsized appetites, bill clinton. that's it for this edition of "reliable sources." i am howard kurtz. check us on itunes on monday, g to the nonfiction tv section of